William L. (William Lewis) Ilgen

Best known for Forge Work (1912), he wrote for students and teachers who needed a straightforward introduction to forging. In the book, he is identified as a forging instructor at Crane Technical High School in Chicago, and he explains that the goal was to put into print the lessons that were often given only orally in class.

That practical focus shapes his writing. Rather than treating metalworking as something mysterious, he breaks it down into tools, shop methods, and step-by-step exercises, making the book useful both as a classroom text and as a record of early 20th-century industrial arts education.

Reliable biographical details about his personal life are limited in the sources I found, but library and public-domain records identify him as William L. Ilgen, or William Lewis Ilgen, and give his lifespan as 1862–1942. Today he is remembered mainly through Forge Work, which remains of interest to blacksmiths, craft historians, and readers curious about traditional technical training.